Most text donors give more than $250 combined annually through all channels.

Three-quarters of text donors have had the same phone number for at least five years, according to a new survey by the mGive Foundation, the Denver-based nonprofit that collects 85 percent of all text donations from wireless carriers.

“There are two numbers that follow you throughout: your social security number and your mobile number,” said mGive Foundation executive director Jenifer Snyder.

In comparison, 14 percent of email addresses expire every year, whether through inactivity or job changes, she said.

The study found that text donors are more likely to give on Saturday evenings. Many also expressed interest in being able to donate more than $10 at one time via text. The mGive Foundation and sister company Mobile Accord tested $25 campaigns in late 2010 to determine whether the higher donations – which are tacked onto cellphone bills – would lead to more declined charges.

The trial found that refund rates stayed the same – at roughly 1 percent – as campaigns with $5 and $10 donations. As a result, some nonprofits should start rolling out $25 dollar donation campaigns by the end of the year, Snyder said.

Most text donors give more than $250 combined annually through all channels, according to the survey. Donors said they text to give because it is convenient, they can control the timing and they don’t like pressure.

Tamara Chuang covers personal technology and local tech news for The Denver Post. She previously spent 10 years doing the same thing for The Orange County Register before taking a hiatus to move here and become a SAHM to a precocious toddler.